The age of the child is an estimate, based on the information that the everage age of all children in this corpus was 5.3, with SD of 9 months (Vedder, Kook & Muysken 1996:465).

The Mother rrole specified for this participant refers to her role as caretaker of the child. Most caretakers in this corpus were indeed the mother of the child, but in some case they were the aunt or the grandmother.